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s390/syscall: Use enter_from_user_mode_randomize_stack()

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enter_from_user_mode_randomize_stack() replaces enter_from_user_mode() and
the subsequent invocation of add_random_kstack_offset_irqsoff().

As a bonus this avoids the overhead of get/put_cpu_var() in
add_random_kstack_offset().

No functional change.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Reviewed-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Link: https://patch.msgid.link/20260707190254.030598804@kernel.org
This commit is contained in:
Thomas Gleixner
2026-07-12 12:38:01 +02:00
parent d023abfbc4
commit 05a194d8bd
1 changed files with 2 additions and 2 deletions
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arch/s390/kernel/syscall.c
+2 -2
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@@ -97,8 +97,8 @@ void noinstr __do_syscall(struct pt_regs *regs, int per_trap)
{
unsigned long nr;
enter_from_user_mode(regs);
add_random_kstack_offset();
enter_from_user_mode_randomize_stack(regs);
regs->psw = get_lowcore()->svc_old_psw;
regs->int_code = get_lowcore()->svc_int_code;
update_timer_sys();